Article
Nanoscience & Nanotechnology
Wael Abuzaid, Mehmet Egilmez, Yuri Chumlyakov
Summary: The study investigates the mechanical properties of VFeCoCrNi alloy at different temperatures, revealing slip dominance at room temperature and early activation of phase transformation at low temperatures.
SCRIPTA MATERIALIA
(2021)
Article
Nanoscience & Nanotechnology
Qian Li, Xiaolin Li, Chi Jin, Haozhe Li, Ke Hua, Xiangtao Deng, Haifeng Wang
Summary: In this study, the Fe50Mn30Co10Cr10 alloy doped with 30 ppm B atoms and proper thermo-mechanical processing has achieved excellent synthetic strength and plasticity. The grain refinement strengthening introduced by B doping and the strong dislocation strengthening of inhomogeneity structure from annealing treatment contribute to enhanced yield strength. Multiple structure evolution during the deformation process leads to excellent ductility. FCC twinning-induced plasticity (TWIP) and transformation-induced plasticity (TRIP) effects contribute to the high plasticity of the alloy. The combination of interstitial atoms doping with TWIP and TRIP effects provides a feasible way for designing high-strength plastic alloys.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Engineering, Mechanical
Zhufeng He, Nan Jia, Haile Yan, Yongfeng Shen, Mingwei Zhu, Xianjun Guan, Xiaoli Zhao, Shenbao Jin, Gang Sha, Yuntian Zhu, Chain T. Liu
Summary: This study presents a novel strategy of heavy nitrogen-doping in a low-cost metastable FeMnCoCr HEA to produce ultrastrong, tough, and low-cost HEAs. By simple thermomechanical processing, a multiheterostructure was formed, leading to a significant increase in yield strength and uniform elongation of the material. The high-nitrogen duplex alloy design strategy developed here provides a new paradigm for developing high-performance fcc HEAs.
INTERNATIONAL JOURNAL OF PLASTICITY
(2021)
Article
Materials Science, Multidisciplinary
Omar El Batal, Wael Abuzaid, Mehmet Egilmez, Maen Alkhader, Luca Patriarca, Riccardo Casati
Summary: High-entropy alloys and medium-entropy alloys, also known as multi-principal element alloys, offer the opportunity to develop new materials with outstanding mechanical properties. By careful selection of elements and thermal processing, these alloys exhibit superior strength and ductility levels at different temperatures through various deformation mechanisms. The strain rate and temperature have significant effects on the plasticity of these alloys.
Article
Nanoscience & Nanotechnology
Kunquan Yuan, Yan Jiang, Shichao Liu, Songsong Xu, Xinzhong Li, Xiaoxiang Wu
Summary: This study investigates the effect of carbon on TWIP and TRIP alloys, and finds that carbon doping can simultaneously enhance the strength and ductility of the alloys. This provides insights for designing high-performance alloys.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Pengda Niu, Ruidi Li, Zhiqi Fan, Tiechui Yuan, Zhijiang Zhang
Summary: The metastable dual-phase Fe50Mn30Co10Cr10 high entropy alloy was prepared successfully using the laser melting deposition (LMD) technique. The as-printed samples showed anisotropic mechanical properties, with deformation bands observed in the FCC matrix after deformation. The formation of stacking faults and increase of dislocations were significantly influenced by sliding of Shockeley partial dislocations, contributing to the nucleation of HCP martensite.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
Qi Wang, Shaoxia Yu, Xiaolin Li, Yanmei Li, Xiangtao Deng, Zhaodong Wang
Summary: We investigated a novel heterostructure design strategy for enhancing the strength and ductility of NbC-reinforced FeMnCoCr high-entropy alloys. The effect of cold-rolled microstructure on annealed microstructure evolution and mechanical properties was studied. The heterostructure with coarse un-recrystallized grains wrapped by recrystallized grains exhibited superior mechanical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Z. Y. You, Z. Y. Tang, B. Wang, H. W. Zhang, P. Li, L. Zhao, F. B. Chu, H. Ding
Summary: The mechanical properties and microstructural evolution of C-doped TRIP-assisted HEA under dynamic loading conditions were systematically investigated in this study. The results showed that dynamic tensile deformation led to an increase in yield strength and a decrease in ultimate tensile strength, with a trend towards increased total elongation. The primary deformation mechanisms shifted from TRIP and TWIP effects to deformation twinning and dislocations. The presence of carbides formed through C-doping hindered dislocation slip and promoted the activation of multiple twinning systems.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Ling Qiao, Aorigele Bao, Zhonghong Lai, Yong Liu, Jingchuan Zhu, Yuan Wang
Summary: This study uncovers correlations between alloying elements and solidification interval characteristics through machine learning, successfully designing and testing the FeCrNiAl0.8 alloy with superior mechanical properties and high temperature competitiveness.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Ling Qiao, Aorigele Bao, Zhonghong Lai, Yong Liu, Jingchuan Zhu, Yuan Wang
Summary: The correlations between alloying elements and solidification interval characteristics were revealed through machine learning; FeCrNiAl0.8 alloy was successfully designed, prepared, and tested with excellent mechanical properties; The experimental results demonstrated outstanding mechanical properties and specific strength of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Metallurgy & Metallurgical Engineering
An Zibing, Mao Shengcheng, Zhang Ze, Han Xiaodong
Summary: High-entropy alloys offer advantages over traditional alloys, such as high strength, toughness, wear resistance, and corrosion resistance. However, there is typically a trade-off between strength and ductility in metals, including high-entropy alloys. The design of high-entropy alloys with both high strength and high ductility has become a limitation in current research. Heterostructure design has been successful in enhancing the strength and toughness of traditional metallic materials, and the application of heterostructures in high-entropy alloys has attracted significant attention in order to achieve both high strength and high ductility. This study provides a review of existing heterostructure design models and discusses the effects of different heterostructures on the strengthening and toughening mechanisms and mechanical properties, with a focus on future microstructural designs for high strength and toughness.
ACTA METALLURGICA SINICA
(2022)
Article
Chemistry, Physical
Dongyue Li, Zhiming Li, Lu Xie, Yong Zhang, Wenrui Wang
Summary: The dual-phase non-equiatomic high-entropy alloy exhibits higher strength and ductility at cryogenic temperatures compared to equiatomic single-phase HEA, with fine-grained structure showing significant advantages over coarse-grained structure due to more extensive displacive transformation. The enhanced transformation behavior is attributed to the reduced stacking fault energy of the material at lower deformation temperatures.
Article
Materials Science, Multidisciplinary
Q. Wang, J. Q. Ren, C. Xin, X. L. Guo, X. F. Lu, K. H. Ji
Summary: A novel near-a Ti alloy with TWIP and TRIP effects was designed, achieving an excellent combination of mechanical properties by tailoring multi-scale α phase. The precipitation of as can effectively block dislocation slip and compensate for the decrease in fracture toughness caused by the increase in strength. The hierarchical distribution of the α phase can lead to more homogeneous strain distribution and relieve stress concentration.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Yang Shao, Zhihao Guo, Yibing Wang, Huan Ma
Summary: The NbC-based cermet with CoCrFeNiMn high-entropy alloys binders were fabricated by powder metallurgy, and the effects of sintering temperatures on its microstructure and mechanical properties were systematically studied. The results showed that the relative densities of the cermet were around 90% at different sintering temperatures, with the hardness and transverse bending strength (TRS) decreasing as the NbC particle size increased. The highest TRS of 497 MPa was obtained at a sintering temperature of 1400 degrees Celsius.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2021)
Article
Chemistry, Physical
Shuyu Liu, Wei Zhang, Yingbo Peng, Rui Zhou, Haijiang Wang, Qingyuan Ma
Summary: The (Fe40Co50Ni10)-(VNbTaZrCx) alloys, strengthened by in-situ high entropy multi-component carbides (MCCs), showed remarkable strengthening and toughening effects. The combination of high entropy MCCs with dispersion strengthening and grain refinement strengthening contributed to the increase in both strength and ductility. The microstructure of the alloys was significantly refined with the increase of carbon content, leading to improved mechanical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Metallurgy & Metallurgical Engineering
Xiao-lin Li, Chi Jin, Hao-zhe Li, Xiao-xiao Hao, Yi He, Xiang-tao Deng, Zhao-dong Wang
Summary: The study found that the austenite transformation temperature decreases with increasing cooling rate in the steels, while the addition of Nb and Mo promotes bainite and martensite transformation and improves the hardenability of steels. Additionally, precipitates formed in deformed austenite and ferrite can be observed simultaneously.
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
(2022)
Article
Nanoscience & Nanotechnology
Chengru Li, Xiaolin Li, Xiangtao Deng, Zhaodong Wang
Summary: The study showed that micron-sized TiC particles improved the strength of the steel within the range of 25-500 degrees Celsius, while significantly impacting its elongation beyond 500 degrees Celsius. The fracture mechanism matched typical ductile fracture within the range of 25-600 degrees Celsius.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Xiangtao Deng, Qi Wang, Long Huang, Yi Cao, Zhaodong Wang
Summary: This study investigates the effect of solidification rate and hot rolling compression ratio on the particle size and wear performance of TiC-reinforced steels. It was found that particle size is the main factor affecting wear resistance, with moderate-sized particles showing the best improvement in wear resistance.
Article
Chemistry, Physical
Xiaolin Li, Qian Li, Haozhe Li, Xiangyu Gao, Xiangtao Deng, Zhaodong Wang
Summary: This study investigates the effect of cooling rate on the microstructure and mechanical properties homogeneity of Ti-bearing microalloyed steel plates. The results show that ultra-fast cooling greatly improves the yield strength and leads to homogeneous grain and precipitate sizes in the thick plates. Crystallographic characteristics of different precipitates have also been studied.
Article
Chemistry, Physical
Xiaolin Li, Chi Jin, Haozhe Li, Xiaoxiao Hao, Ke Hua, Xiangtao Deng, Haifeng Wang, Zhaodong Wang
Summary: This study developed a novel series of AlCrCuFeNi2Vx high-entropy alloys and investigated the relationship between composition, processing, microstructure, and mechanical properties. The addition of V element improved the strength and ductility of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Xiaolin Li, Xiaoxiao Hao, Chi Jin, Qi Wang, Xiangtao Deng, Haifeng Wang, Zhaodong Wang
Summary: The mechanical properties and deformation mechanism of a C-doped interstitial high-entropy alloy were studied, and an excellent combination of strength and ductility was achieved through cold rolling and annealing. The deformation mechanism was found to involve dislocation slip, deformation-driven phase transformation, and deformation twinning. The simultaneous effect of phase transformation and mechanical twinning delayed the shrinkage and improved the tensile strength and plasticity.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Xiaolin Li, Haozhe Li, Linxi Liu, Xiangtao Deng, Zhaodong Wang
Summary: The formation mechanism of complex precipitates in Nb-V microalloyed steel has been studied using HRTEM and APT, revealing two precipitation mechanisms: replacement and heterogeneous modes. Core-shell precipitates formed by the heterogeneous mechanism exhibit double direction Moire ' fringe, while those with uniform distributed V and Nb atoms are formed by the replacement mechanism. The APT results show an increase in the V to Nb ratio with particle size, consistent with previous TEM findings.
Article
Materials Science, Multidisciplinary
Ke Hua, Qiong Wan, Ziqi Zhou, Qing Zhou, Xiaolin Li, Hongxing Wu, Haifeng Wang
Summary: By reducing the content of Nb element, the wear resistance of TiZrHfNb refractory high entropy alloys (RHEAs) can be significantly improved. The wear loss is directly related to the subsurface instabilities induced by plastic deformation during friction, which can be attributed to the grain refinement and deformation-induced phase transformation.
Article
Chemistry, Physical
Chi Jin, Xiaolin Li, Haozhe Li, Qian Li, Haifeng Wang
Summary: Refractory high-entropy alloys (RHEAs), such as Ti-Zr-Nb-Mo, have gained attention for their high-temperature resistance, mechanical properties, and wear performance. This study focused on investigating the microstructure, oxidation resistance, tribological properties, and mechanisms of TiZrNbMo0.6 RHEA. The results showed that the alloy exhibited optimal wear resistance through the formation of a compacted and continuous glaze layer at 500 degrees C. The wear mechanism evolved with temperature, transitioning from abrasive wear and adhesive wear at room temperature to oxidative wear and slight abrasive wear at 500 degrees C. At 800 degrees C, severe oxidative wear became the dominant mechanism, accompanied by partial abrasive wear, resulting in a higher wear rate compared to 500 degrees C.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Industrial
Xu Yang, Shu-nan Chen, Bingxing Wang, Xiaolin Li, Bin Wang, Yong Tian
Summary: Cold-rolled Inconel 718 exhibited excellent superplasticity at high temperature and high strain rate, due to the rapid atomic diffusion caused by dislocations and the grain refinement induced by cold rolling. The dislocations and recrystallization process have a significant impact on the material's tensile properties.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Xiaolin Li, Haozhe Li, Qian Li, Xiangyu Gao, Xiangtao Deng, Haifeng Wang
Summary: A new crystallographic orientation relationship (OR) between MC and ferrite has been observed in microalloyed steel produced by new-generation thermo-mechanical processing. The selected area electron diffraction patterns provide strong evidence and the coordinate transformation matrices confirm the uniqueness of the new OR. The interfacial energy for the new OR is higher compared to traditional ORs.
MATERIALS CHARACTERIZATION
(2022)
Article
Nanoscience & Nanotechnology
Xiaolin Li, Yi He, Linxi Liu, Xiangyu Gao, Ke Hua, Haifeng Wang
Summary: By introducing different nanoscale superlattices simultaneously in Ni-based alloys, the strength and ductility of the material can be significantly improved, providing new insights for designing high-performance nickel-based superalloys.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Multidisciplinary
Yue Ren, Tingyi Yan, Zhuobin Huang, Qing Zhou, Ke Hua, Xiaolin Li, Yin Du, Qian Jia, Long Zhang, Haifeng Zhang, Haifeng Wang
Summary: This study demonstrates an improvement in wear resistance for a Ti-based bulk metallic glass composite at cryogenic temperatures. The wear resistance improvement is associated with the suppressed martensitic transformation and increased strength, making the material an excellent candidate for cryogenic wear applications.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Ahmad Mirzaei, Peter D. Hodgson, Xiang Ma, Vanessa K. Peterson, Ehsan Farabi, Gregory S. Rohrer, Hossein Beladi
Summary: This study investigated the influence of parent austenite grain refinement on the intervariant boundary network in a lath martensitic steel. It found that refining the parent austenite grain led to a decrease in the fraction of certain boundaries in the martensite and an increase in the connectivity of low energy boundaries, ultimately improving the impact toughness.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
N. L. Church, C. E. P. Talbot, L. D. Connor, S. Michalik, N. G. Jones
Summary: Metastable beta Ti alloys based on the Ti-Nb system have attracted attention due to their unique properties. However, the unstable cyclic behavior of these alloys has hindered their widespread industrial use. Recent studies have shown that internal stresses, including those from dislocations, may be responsible for this behavior. This study demonstrates that inter-cycle thermal treatments can mitigate the unstable cyclic behavior, providing a significant breakthrough in our understanding of Ti-Nb superelastic materials.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Di Zhao, Chenchen Zhao, Ziyang Xiu, Jiuchun Yan
Summary: This study proposes a novel strategy for achieving the bonding of SiC ceramic and Al alloy using ultrasound. The ultrasound promotes the dissolution of Al into the solder, activating the solder and triggering the interfacial reaction between SiC ceramic and solder. With increasing ultrasonic duration, the bonding between SiC and Al transitions from partial to full metallurgical bonding.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Kang Du, Yang Zhang, Guangda Zhao, Tao Huang, Liyuan Liu, Junpeng Li, Xiyu Wang, Zhongwu Zhang
Summary: This paper systematically investigated the evolution of microstructure in Fe-Ni-Co-Al polycrystalline alloys and its effects on mechanical properties. The results revealed that the migration of grain boundaries in different processes is driven by different factors, which impacts the grain orientation and precipitate formation. In the process of directional recrystallization, grains with specific orientations grow in the grain boundary region and form the dominant orientation, while grains with lower migration rate form the minor orientation. The alloy produced through directional recrystallization exhibited good recoverable strain and superelastic strain, while the alloy produced through solid solution treatment showed no evident superelastic behavior.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Edohamen Awannegbe, Liang Chen, Yue Zhao, Zhijun Qiu, Huijun Li
Summary: This study employed laser metal deposition to additively manufacture Ti-15Mo wt% alloy, and subsequently subjected it to post-fabrication uniaxial thermomechanical processing. The results showed that different zones in the microstructure remained after processing, and deformation mechanisms mainly involved slip and martensite formation. The compressive mechanical properties were found to be dependent on strain rate, with higher flow stress and compressive strength observed at higher strain rates. Grain structure homogenisation was not achieved, leading to anisotropic tensile properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Reza Khatib Zadeh Davani, Enyinnaya George Ohaeri, Sandeep Yadav, Jerzy A. Szpunar, Jing Su, Michael Gaudet, Muhammad Rashid, Muhammad Arafin
Summary: This research aims to investigate the effect of roughing and finishing reductions on crystallographic texture. The results show significant heterogeneity in the centerline region, with higher intensity of certain textures. Drop Weight Tear Test indicates that steel specimens with lower and medium reductions exhibit superior low-temperature impact toughness compared to steel with higher reductions. The electrochemical hydrogen charging experiments confirm the presence of internal hydrogen cracks only in steel with lower and medium reductions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Flavio De Barbieri, Denis Jorge-Badiola, Rodrigo Allende, Karem Tello, Alfredo Artigas, Franco Perazzo, Henry Jami, Juan Perez Ipina
Summary: This study examines the effect of Cr additions on the mechanical behavior of TWIP steel at temperatures ranging from 25°C to 350°C. The results indicate that different temperature-dependent strengthening mechanisms, including mechanical twinning, Dynamic Strain Aging, and slip bands, are at play. The stacking fault energy (SFE) influences the percentage of mechanical twinning, which in turn affects the strain hardening rate.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Hanlin Peng, Siming Huang, Ling Hu, Bingbing Luo, Liejun Li, Ian Baker
Summary: This study explores the weldability, microstructures, and mechanical properties of two L1(2)-nanoparticle-strengthened medium-entropy alloys after electron beam welding (EBW). The results show that strong yet ductile defect-free joints were produced, with larger grain sizes in the fusion zones compared to the heat-affected zones and base materials. Both EBWed MEAs exhibited high yield strengths, high ultimate tensile strengths, and good fracture strains at 77 K. The V-doping improved the cryogenic mechanical properties of the TMT MEA.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yongxin Wang, Lei Chen, Lizi Shao, Shuo Hao, Motomichi Koyama, Xingzhou Cai, Xiaocong Ma, Miao Jin
Summary: This study investigated the tensile deformation behavior of an Mn-N bearing lean duplex stainless steel with metastable austenite. The results showed that the strain rate had significant influence on the work hardening, strain-induced martensitic transformation, and fracture mechanism.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Jong Woo Won, Seulbi Lee, Hye-Jeong Choe, Yong-Taek Hyun, Dong Won Lee, Jeong Hun Lee
Summary: Cold-rolled pure titanium showed improved sheet formability after undergoing cryogenic-deformation treatment. This treatment increased the thinning capability of the titanium and suppressed cracking during sheet forming. The formation of twins during deformation contributed to high thinning capability and increased strength through grain refinement and dislocation accumulation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Handong Li, Lin Su, Lijuan Wang, Yanbin Jiang, Jiahui Long, Gaoyong Lin, Zhu Xiao, Yanlin Jia, Zhou Li
Summary: Homogenization heat treatment is a key procedure in controlling the second phase, enhancing composition uniformity, and workability of as-cast Cu-15Ni-8Sn alloy. This study found that electropulsing treatment (EPT) can significantly reduce treatment temperature and time, improve elongation and overall mechanical properties of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yuxuan Wang, Juntao Zou, Lixing Sun, Yunfei Bai, Zhe Zhang, Junsheng Cheng, Lin Shi, Dazhuo Song, Yihui Jiang, Zhiwei Zhang
Summary: A novel mechanical-heat-electricity synergistic method was proposed to enhance the mechanical properties of Cu-15Sn-0.3Ti alloy by forming annealing twins (ATs). The combination method of Rotary swaging (RS) and Electric pulse treatment (EPT) successfully induced recrystallization and refinement of the microstructure, leading to a significant increase in the strength of the alloy within a short time.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Zhiyi Ding, Jiangtao Xie, Tong Wang, Aiying Chen, Bin Gan, Jinchao Song
Summary: This study demonstrated the Ta-induced strengthening of CoCrNi-AlTi MEAs using nanoscale heterogeneous coherent precipitates. The addition of Ta and aging treatments significantly enhanced the mechanical properties of the alloy, including yield strength, ultimate tensile strength, and elongation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Z. Y. You, Z. Y. Tang, B. Wang, H. W. Zhang, P. Li, L. Zhao, F. B. Chu, H. Ding
Summary: The mechanical properties and microstructural evolution of C-doped TRIP-assisted HEA under dynamic loading conditions were systematically investigated in this study. The results showed that dynamic tensile deformation led to an increase in yield strength and a decrease in ultimate tensile strength, with a trend towards increased total elongation. The primary deformation mechanisms shifted from TRIP and TWIP effects to deformation twinning and dislocations. The presence of carbides formed through C-doping hindered dislocation slip and promoted the activation of multiple twinning systems.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Feng Qin, Feihu Chen, Junhua Hou, Wenjun Lu, Shaohua Chen, Jianjun Li
Summary: Plastic instability in strong multilayered composites is completely suppressed by architecting nanoscale BCC Nb crystalline-amorphous CuNb interfaces.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
